Advertisements
Advertisements
Question
A driver uses a convex mirror as a rearview mirror. Explain the reason with the help of a ray diagram.
Advertisements
Solution
A convex mirror always forms a small and upright image between pole and focus. That means in a small area of mirror driver can see all the traffic coming from behind.
APPEARS IN
RELATED QUESTIONS
If the image formed by a mirror for all positions of the object placed in front of it is always diminished, erect and virtual, state the type of the mirror and also draw a ray diagram to justify your answer. Write one use such mirrors are put to and why.
Draw diagram to show the action of convex mirror on a beam of parallel light rays. Mark on this diagram principal axis, focus F, centre of curvature C, pole P and focal length f, of the convex mirror.
State the relation between object distance, image distance and focal length of a spherical mirror (concave mirror or convex mirror).
What is the advantage of using a convex mirror as rear-view mirror in vehicles as compared to a plane mirror? Illustrate your answer with the help of labelled diagrams.
Draw a labelled ray diagram to show the formation of image of an object by a convex mirror. Mark clearly the pole, focus and centre of curvature on the diagram.
Whatever be the position of the object, the image formed by a mirror is virtual, erect and smaller than the object. The mirror then must be:
(a) plane
(b) concave
(c) convex
(d) either concave or convex
Two big mirrors A and B are fitted side by side on a wall. A man is standing at such a distance from the wall that he can see the erect image of his face in both the mirrors. When the man starts walking towards the mirrors, he find that the size of his face in mirror A goes on increasing but that in mirror B remains the same.
(a) mirror A is concave and mirror B is convex
(b) mirror A is plane and mirror B is concave
(c) mirror A is concave and mirror B is plane
(d) mirror A is convex and mirror B is concave
Draw the given diagram in your answer book and complete it for the path of a ray of light after passing through the lens.
Write true or false
The focal length of a convex mirror is equal to its radius of curvature.
Why are the mirrors fitted on the outside of cars convex?
